#3 Prevent <pre>-tags form stacking

[manuthie]

If you write something like the following into a wiki article it doesn't look like expected because the middle line will get an additional <pre id='intended'></pre> section:

<code><pre>
if (500/5 == 100) {
doSth();
}
</pre></code>

This makes the <pre>-tag pretty much useless. I modified the IntendedFilter-Class so it wont stack <pre>-tags.

[manuthie]

Fixed IntendedFilter

[manuthie]

Ok, the line with doSth(); is supposed to be indented.

[rico_g]

Awesome! Thanks for helping out. I will include your change in the next release.

Ciao,
Rico.